LP38856T-1.2 datasheet(4/14 Pages) NSC

Part #	LP38856T-1.2

Description	3A Fast-Response High-Accuracy LDO Linear Regulator with Enable

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Electrical Characteristics Unless otherwise specified: V

IN =VOUT(NOM) + 1V, VBIAS = 3.0V, IOUT =10mA,

CIN =COUT = 10 µF, CBIAS = 1µF, VEN =VBIAS. Limits in standard type are for TJ = 25˚C only; limits in boldface type apply

over the junction temperature (T

J) range of -40˚C to +125˚C. Minimum and Maximum limits are guaranteed through test,

design, or statistical correlation. Typical values represent the most likely parametric norm at T

J = 25˚C, and are provided for

reference purposes only. (Continued)

Symbol

Parameter

Conditions

MIN

TYP

MAX

Units

ENABLE Pin

I

EN

ENABLE pin Current

V

EN =VBIAS

-

0.01

-

µA

V

EN = 0.0V, VBIAS = 5.5V

-19

-13

-30

-40

-51

V

EN(ON)

Enable Voltage Threshold

V

EN rising until Output = ON

1.00

0.90

1.25

1.50

1.55

V

EN(HYS)

Enable Voltage Hysteresis

V

EN falling from VEN(ON) until

Output = OFF

50

30

100

150

200

mV

t

OFF

Turn-OFF Delay Time

R

LOAD xCOUT << tOFF

-20-

µs

t

ON

Turn-ON Delay Time

R

LOAD xCOUT << tON

-15-

AC Parameters

PSRR

(V

IN)

Ripple Rejection for V

IN Input

Voltage

V

IN =VOUT +1V,

f = 120 Hz

-80-

dB

V

IN =VOUT + 1V,

f=1kHz

-65-

PSRR

(V

BIAS)

Ripple Rejection for V

BIAS

Voltage

V

BIAS =VOUT + 3V,

f = 120 Hz

-58-

dB

V

BIAS =VOUT + 3V,

f=1kHz

-58-

e

n

Output Noise Density

f = 120 Hz

-

1

-

µV/

√Hz

Output Noise Voltage

BW = 10 Hz − 100 kHz

-

150

-

µV (rms)

BW = 300 Hz − 300 kHz

-

90

-

Thermal Parameters

T

SD

Thermal Shutdown Junction

Temperature

-

160

-

˚C

T

SD(HYS)

Thermal Shutdown Hysteresis

-

10

-

θ

JA

Thermal Resistance, Junction to

Ambient(Note 3)

TO220-5

-

60

-

˚C/W

TO263-5

-

60

-

θ

JC

Thermal Resistance, Junction to

Case(Note 3)

TO220-5

-

3

-

TO263-5

-

3

-

Note 1: Absolute maximum ratings indicate limits beyond which damage to the component may occur. Operating ratings indicate conditions for which the device

is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications, see Electrical Characteristics. Specifications do not

apply when operating the device outside of its rated operating conditions.

Note 2: The Human Body Model (HBM) is a 100 pF capacitor discharged through a 1.5k resistor into each pin. Test method is per JESD22-A114. The HBM rating

for device pin 1 (EN) is ±1.5 kV.

Note 3: Device power dissipation must be de-rated based on device power dissipation (TD), ambient temperature (TA), and package junction to ambient thermal

resistance (

θJA). Additional heat-sinking may be required to ensure that the device junction temperature (TJ) does not exceed the maximum operating rating. See

the Application Information section for details.

Note 4: Output voltage line regulation is defined as the change in output voltage from nominal value resulting from a change in input voltage.

Note 5: Output voltage load regulation is defined as the change in output voltage from nominal value as the load current increases from no load to full load.

Note 6: Dropout voltage is defined the as input to output voltage differential (VIN -VOUT) where the input voltage is low enough to cause the output voltage to drop

no more than 2% from the nominal value

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